Maimonides' Code - the Mishneh Torah in English:

Several recent editions have been published since 2000. I need to update this list.

Maimonides–Essential Teachings on Jewish Faith and Ethics: The “Book of Knowledge” and the Thirteen Principles of Faith–Selections Annotated and Explained
Book I - “Book of Knowledge”
Translation into English and annotation by Rabbi Marc D. Angel, PhD
with introduction, notes, and bibliography
Jewish Lights (SkyLight) Illuminations Series
(Woodstock, Vermont: Jewish Lights Publishing, 2012)
The entire five parts of the “Book of Knowledge” –

The Code of Maimonides
Book XIV - “Book of Judges”
Translated into English by Abraham M. Hershman
“The Laws of Kings and Their Wars” are in The Book of Judges
Yale Judaica Series, volume iii
(New Haven, Connecticut: Yale University Press, 1949)

Mishneh Torah: The Book of Knowledge
by Maimonides
Translated and edited by Moses Hyamson
with introduction, Biblical and Talmudical references, and notes
English and Hebrew on facing pages
Edited according to the Bodleian (Oxford) Codex
"The Torah Classics Library"
Book I of the fourteen books of The Mishneh TorahThe Book of Knowledge contains the five parts:

Mishneh Torah: The Book of Adoration
by Maimonides
Translated and edited by Moses Hyamson with a preface
Talmudical references and footnotes by Rabbi Chaim M. Brecher
English and Hebrew on facing pages
Edited according to the Bodleian (Oxford) Codex
This codex bears a note in Maimonides' own hand attesting that the manuscript was corrected by comparison with his own original copy of the Mishneh Torah.
"The Torah Classics Library"
Book II of the fourteen books of The Mishneh TorahThe Book of Adoration contains the five parts:

Abridgements of Maimonides' Code - the Mishneh Torah in English:

A Maimonides Reader
Edited, with introductions and notes, by Isadore Twersky
from the Library of Jewish Studies series, Neal Kozodoy, editor
Professor Twersky presents a limited selection of laws from the Code (Mishneh Torah) to illustrate Maimonides' influence on historical Judaism. Twersky chooses less than a handful of laws from each of only 147 of the 999 chapters that comprise the Code. He also presents excerpts from Guide of the Perplexed, Book of Commandments, and other writings.
(New York: Behrman House, Inc., 1972)
• BM545.A45T9 1972
• 296.3 76-160818
ISBN: 0-87441-206-4

Maimonides' Mishneh Torah (Yad Hazakah), abridged and translated into English by Philip Birnbaum
Selected laws from Maimonides' Code, edited from rare manuscripts and early texts
with the Hebrew vocalized text on facing pages, notations, and introduction
Dr. Birnbaum fails to include anything from the chapters that contain the Noahide Code.
(New York: Hebrew Publishing Company, 1967)

An essential reader of some of Maimonides' works in English:

The Essential Maimonides: Translations of the Rambam
Translated and presented by Avraham Yaakov Finkel in English

These five parts comprise in capsule form the full range of Maimonides' views on G-d, Torah, humanity, and the world. They also provide insight into the mindset of Maimonides, the prodigious genius and compassionate leader of the Jewish people (from the book's jacket).